In an effort to extend the usefulness of microwave cavity detectors to higher axion masses, above ~8 μeV (~2 GHz), a numerical trade study of cavities was conducted to investigate the merit of using variable periodic post arrays and regulating vane designs for higher-frequency searches. The results show that both designs could be used to develop resonant cavities for high-mass axion searches. Multiple configurations of both methods obtained the scanning sensitivity equivalent to approximately 4 coherently coupled cavities with a single tuning rod.
@article{arxiv.1603.06990,
title = {Cavity design for high-frequency axion dark matter detectors},
author = {I. Stern and A. A. Chisholm and J. Hoskins and P. Sikivie and N. S. Sullivan and D. B. Tanner and G. Carosi and K. van Bibber},
journal= {arXiv preprint arXiv:1603.06990},
year = {2016}
}